java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

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Any worker thread runs in background, since it is not intended to loop, is not connected to a Looper.for example doInBackground(). its implementation returns will be passed to onPostExecute() which runs on the UI thread.

Solutions on the web

via GitHub by zosocanuck
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Manuli
, 2 years ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by kanhaiyabgs
, 7 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Ankita Sethi
, 7 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Google Groups by Esa Kylli, 7 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by 4naxr
, 9 months ago
Can't create handler inside thread that has not called Looper.prepare()
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.(Handler.java:200)
at android.os.Handler.(Handler.java:114)
at android.widget.Toast$TN.(Toast.java:345)
at android.widget.Toast.(Toast.java:101)
at android.widget.Toast.makeText(Toast.java:259)
at com.xxx.yyy.OrdersFragment.onEventMainThread(OrdersFragment.java:90)
at org.greenrobot.eventbus.EventBus.invokeSubscriber(EventBus.java:485)
at org.greenrobot.eventbus.EventBus.postToSubscription(EventBus.java:416)
at org.greenrobot.eventbus.EventBus.postSingleEventForEventType(EventBus.java:397)
at org.greenrobot.eventbus.EventBus.postSingleEvent(EventBus.java:370)
at org.greenrobot.eventbus.EventBus.post(EventBus.java:251)

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